如何调用在C＃异步的任何方法 [英] How to call any method asynchronously in c#

问题描述

可能有人请告诉我code的一个小片段演示如何异步调用的方法在C＃中？

Could someone please show me a small snippet of code which demonstrates how to call a method asynchronously in c#?

推荐答案

如果您使用action.BeginInvoke（），您have要调用EndInvoke 地方 - 否则框架必须持有堆的异步调用的结果，导致内存泄漏

If you use action.BeginInvoke(), you have to call EndInvoke somewhere - else the framework has to hold the result of the async call on the heap, resulting in a memory leak.

如果你不希望跳转到C＃5的异步/等待的关键字，你可以使用.NET 4的任务的Parallels库它的很多，比使用的BeginInvoke / EndInvoke会更好了，并给出了一个干净的方式对于异步作业，发射后不管：

If you don't want to jump to C# 5 with the async/await keywords, you can just use the Task Parallels library in .Net 4. It's much, much nicer than using BeginInvoke/EndInvoke, and gives a clean way to fire-and-forget for async jobs:

using System.Threading.Tasks;
...
void Foo(){}
...
new Task(Foo).Start();

如果你有方法来调用带参数，你可以使用lambda简化呼叫，而无需创建代表：

If you have methods to call that take parameters, you can use a lambda to simplify the call without having to create delegates:

void Foo2(int x, string y)
{
    return;
}
...
new Task(() => { Foo2(42, "life, the universe, and everything");}).Start();

我确信（但无可否认不积极）是pretty，在C＃5异步/等待语法是围绕着任务库只是语法糖。

I'm pretty sure (but admittedly not positive) that the C# 5 async/await syntax is just syntactic sugar around the Task library.

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